Thinking too hard—even in a thinking game like this, will do no one any good for (apart from becoming stressful) it will not only snatch the fun away, but also draw us away from our best potentials (nobody could do their best if they’re worn out).
Here, were there a U available on the board, this would be ANTIQUES (a bingo)—or, were there be another A, 4A:QANAT would still be a big timer (though not a bingo). But since neither seems to be the case, it would be better to forget about those ifs and all that jazz. Let’s stick with the facts instead.
Blue has just made N3:TEA. Seeing how the board is going (an open one), it looks like Blue’s having a hard time with his rack combination—and being desperate for a change. But this surely looks like a setup too. It’s like his way in saying: “So you want the top row, Red? Then I’ll do the bottom.” This might indeed be a good move by Blue, opening up new possibilities when whatever available doesn’t look very promising.